American Rifleman - October 2009 - (Page 90)

TECHNICAL DOPE BAG FNH USA FNAR 7.62x51 mm NATO RIFLE he FNAR is a gas-operated semi-automatic .308 Win. tactical ri e based on Browning’s BAR ShortTrac semiautomatic ri e. Designed to be a short- to medium-range ri e, the FNAR is available in both light- and heavy-barrel variants, the latter being about a pound heavier than the former. All models accept proprietary FN 10- and 20-round magazines. A simple philosophy guided the development of the FNAR: to provide autoloading speed along with bolt-action accuracy. The FNAR is guaranteed to group into 1 m.o.a. or less with the proper ammunition. Contributing to this is the ri e’s 20" chromemolybdenum steel barrel, with cold-hammer-forged ri ing in a 1:12" four-groove, right-hand twist. Both bore and chamber are T hard-chromed for durability. The chamber is cut to SAAMI speci cations for the commercial .308 Win., but is also optimized for the use of 7.62x51 mm NATO ammunition as well. The muzzle has a recessed, target-style crown. The chamber end of the barrel terminates in an integral extension that is clamped rmly in the receiver ring and contains recesses for the bolt head’s locking lugs. Both the light- and heavy-pro le barrels have six utes and a matte black nish. The split-ring clamping system that retains the barrel in the receiver allows for a solid barrel/ receiver joint and also facilitates barrel changes by armorers. The FNAR’s gas system is essentially the same as that of the BAR. Propellant gas is bled from a port in the barrel about 9¼" forward of the receiver ring, and enters the gas cylinder af xed to the underside of the barrel inside the foreend. The gas impels the gas piston assembly 3/8" to the rear, which, in turn, pushes on the inertia block and action bars, which run into the receiver to connect to the bolt carrier. As the carrier moves rearward, the bolt head is cammed counterclockwise until its lugs unlock from the barrel extension, the empty case is extracted and ejected, the action spring beneath the barrel is compressed, and the hammer is cocked. Returning forward, the bolt and carrier strip the top round from the magazine and feed it into the chamber, and the bolt head enters the barrel extension and rotates clockwise to lock the action. A novel feature of the FNAR is the bolt-forward indicator, a red dot on the bottom edge of the ejection port that is visible only when the bolt is fully forward and locked into the barrel extension. The trigger group is retained in the receiver by two crosspins. The two-stage trigger is factory-set from 3 lbs., 4 ozs. to 5 lbs., 8 ozs., and is not user-adjustable. Just rearward of the trigger guard is a crossbolt safety that, when engaged, locks the trigger. The safety can be reversed for left-handed shooters. The FNAR is a gas-operated .308 Win. tactical rifle based on the commercial BAR rifle. The FNAR’s trigger group (l.) can be removed from the receiver as a unit. A reversible crossbolt safety is at the rear of the trigger guard. 90 O CTOBER 2009 WWW.AMERICANRIFLEMAN.ORG http://WWW.AMERICANRIFLEMAN.ORG

Table of Contents for the Digital Edition of American Rifleman - October 2009

American Rifleman - October 2009
Contents
From The Editor
Armed Citizen
Standing Guard
President’s Column
Welcome To NRACountry
Readers Write
News, Notes and Ephemera
Questions & Answers
Loading Bench
The Mayor vs. The People
Ruger’s SR-556: Ready To Run, Right Out Of The Box
The Colt U.S. M4 Carbine
The Truth About Gun Shows
Lincoln’s Rifles: “They Might Have Stayed To See The Shooting”
What Is A Purpose-Built Shotgun?
The ABCs Of Handgun Marksmanship
Making The Right Turn
Dope Bag: Data & Comment
Political Report
Trigger The Vote
NRA-ILA Report
Regional Report/Member Info & Benefits
Programs & Services
I Have This Old Gun

American Rifleman - October 2009

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